reporter: body scanners are being installed not only in the us airports but also in the netherlands canada and the uk. many other countries aren't using them yet because they have other concerns about cost and privacy, brian. >> laura evans tonight. >>> the united states is pressuring countries around the world to use full body scanners at airports. germany just started testing one. dubai is stopping the scanners. italy also says they're too slow and ineffective. jim harper joins us to talk about this. jim, the point is simple, right? we have to go through the shoe thing, we have to go through the liquid thing. depending upon what country you're coming from to the united states, they don't have to. what's the point here? >> as the secretary, you're trained to harmonize international standards at a very high level. countries are debating what the appropriate standards are. whether we should use the so-called strip machines around the world. they provide a small margin of security at a high cost of privacy and a delay at the airport. >> do we have the power to influence them? it seems countr